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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 typedef void AnimationCallback(num currentTime); | 5 typedef void AnimationCallback(num currentTime); |
6 | 6 |
7 class CallbackData { | 7 class CallbackData { |
8 final AnimationCallback callback; | 8 final AnimationCallback callback; |
9 final num minTime; | 9 final num minTime; |
10 int id; | 10 int id; |
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90 void _setupInterval() { | 90 void _setupInterval() { |
91 // Assert that we never schedule multiple frames at once. | 91 // Assert that we never schedule multiple frames at once. |
92 assert(_intervalId === null); | 92 assert(_intervalId === null); |
93 if (USE_INTERVALS) { | 93 if (USE_INTERVALS) { |
94 _intervalId = window.setInterval(_step, MS_PER_FRAME); | 94 _intervalId = window.setInterval(_step, MS_PER_FRAME); |
95 } else { | 95 } else { |
96 if (_webkitAnimationFrameMaybeAvailable) { | 96 if (_webkitAnimationFrameMaybeAvailable) { |
97 try { | 97 try { |
98 // TODO(jacobr): passing in document should not be required. | 98 // TODO(jacobr): passing in document should not be required. |
99 _intervalId = window.webkitRequestAnimationFrame( | 99 _intervalId = window.webkitRequestAnimationFrame( |
100 (int ignored) { _step(); }, document); | 100 (int ignored) { _step(); }); |
101 // TODO(jacobr) fix this odd type error. | 101 // TODO(jacobr) fix this odd type error. |
102 } catch (var e) { | 102 } catch (var e) { |
103 _webkitAnimationFrameMaybeAvailable = false; | 103 _webkitAnimationFrameMaybeAvailable = false; |
104 } | 104 } |
105 } | 105 } |
106 if (!_webkitAnimationFrameMaybeAvailable) { | 106 if (!_webkitAnimationFrameMaybeAvailable) { |
107 _intervalId = window.setTimeout(() { _step(); }, MS_PER_FRAME); | 107 _intervalId = window.setTimeout(() { _step(); }, MS_PER_FRAME); |
108 } | 108 } |
109 } | 109 } |
110 } | 110 } |
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157 _frameCount++; | 157 _frameCount++; |
158 if (_isMobileSafari) { | 158 if (_isMobileSafari) { |
159 // Hack to work around an iOS bug where sometimes animations do not | 159 // Hack to work around an iOS bug where sometimes animations do not |
160 // render if only webkit transforms were modified. | 160 // render if only webkit transforms were modified. |
161 // TODO(jacobr): find a cleaner workaround. | 161 // TODO(jacobr): find a cleaner workaround. |
162 int offset = _frameCount % 2; | 162 int offset = _frameCount % 2; |
163 _safariHackStyle.left = '${offset}px'; | 163 _safariHackStyle.left = '${offset}px'; |
164 } | 164 } |
165 } | 165 } |
166 } | 166 } |
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